SONIC 3100 PHASE 2 offers all the
features of its single stage brother with the addition of a booster stage
also with a 54mm host mount. This is a beefy rocket. Extra high strength
components throughout facilitate flights over Mach 2 despite the large
size
and helps to withstand hard landings. Parachute recovery of both stages
is
accomplished by the use of Discontinuous Staging which is exclusive to
U.S.
Rockets. Stable design, through the wall fin attach and performance
engineering.The 54mm host mount accepts motors I to K as well as optional
Interchange mounts for 29mm, 38mm or 3-24mm. Extra thick plywood fins and
rings and triple strength aerospace spec tubing. Very simple assembly.
Build in one day.

SONIC 3100 PHASE 2
can be slightly modified to
accept new dual deployment systems and altimiters. The payload
can be deployed on both sides of
the coupler or both sides of the payload tube. This rocket is
recomended for high power and high thrust sport flights. It flies
surprisingly well on H240-8 to H60-8. Best flights are with USR I250-8
to
I65-12 or J500-8 to J125-12. SONIC 3100 PHASE 2 has been successfully
tested
with as high of power as K250-12 with a payload and as high thrust as
J880
with no payload. Test it for yourself!

All I can say with the kit was I received delivery
within 10 days of ordering. The kit came with all the parts,
instructions, etc. as advertised. The plywood for the CRs and fins
is high quality (multi-layer, cut clean, no warpage and fit well
with only a bit of sanding). I'm not a USR supporter or detractor,
just saying that compared to the price of other similar kits, this
3" two-stage 54mm HPR kit for its price represents a good value.
-dixontj 7-11